I am trying to create a VendorBill with expense line and getting INVALID_CONTENT error, which is not very helpful to resolve.

Below is the Request JSON body.

{   "customForm": {"id": "220"},   "entity": {"id": "2064"},   "tranId": "GYANREF1234",   "subsidiary": {"id": "88"},   "memo": "Vendor Bill created via REST API",   "tranDate": "2025-05-13T00:00:00Z",   "account": "981",   "postingperiod": "75",   "dueDate": "2025-05-31T00:00:00Z",   "department": {"id": "103"},   "class": {"id": "122"},   "approvalStatus": {        "id": "1",        "refName": "Pending Approval"    },    "custbody_northspyreid": "GTest1",     "expense": [    {    "account": {"id": "915"},    "department": {"id": "103"},    "class": {"id": "122"},    "cseg_driftwood_proj": {"id": "653"},    "memo": "Line Description Test1",    "amount": 3000.55    }    ]  }

Below is the Response JSON Body:

{    "type": "https://www.rfc-editor.org/rfc/rfc9110.html#section-15.5.1",    "title": "Bad Request",    "status": 400,    "o:errorDetails": [        {            "detail": "Invalid content in the request body.",            "o:errorCode": "INVALID_CONTENT"        }    ]}